: If you are a lead or active contributor to a non-commercial open-source project, you can apply for a free license.

If you are looking for this specific version or a way to use PhpStorm for free, here is the essential information: Legitimacy and Availability

: You can get a free All Products Pack license if you have a valid university email or ISIC card.

If you are running an older Mac and specifically need this 2017 version: Download PhpStorm: The PHP IDE - JetBrains